multiple payout page and small fixes

frontend/pshared/lib/provider/payment/multiple/provider.dart

@@ -12,14 +12,13 @@ class MultiPaymentProvider extends ChangeNotifier {
   late OrganizationsProvider _organization;
   late MultiQuotationProvider _quotation;
 
-  Resource<List<Payment>> _payments = Resource(data: []);
-  bool _isLoaded = false;
+  Resource<List<Payment>> _payments = Resource(data: null);
 
   List<Payment> get payments => _payments.data ?? [];
   bool get isLoading => _payments.isLoading;
   Exception? get error => _payments.error;
   bool get isReady =>
-      _isLoaded && !_payments.isLoading && _payments.error == null;
+      _payments.data != null && !_payments.isLoading && _payments.error == null;
 
   void update(
     OrganizationsProvider organization,
@@ -56,7 +55,6 @@ class MultiPaymentProvider extends ChangeNotifier {
         metadata: metadata,
       );
 
-      _isLoaded = true;
       _setResource(
         _payments.copyWith(data: response, isLoading: false, error: null),
       );
@@ -70,8 +68,7 @@ class MultiPaymentProvider extends ChangeNotifier {
   }
 
   void reset() {
-    _isLoaded = false;
-    _setResource(Resource(data: []));
+    _setResource(Resource(data: null));
   }
 
   void _setResource(Resource<List<Payment>> payments) {

frontend/pshared/lib/provider/payment/multiple/quotation.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/foundation.dart';
 
 import 'package:uuid/uuid.dart';
@@ -17,11 +19,13 @@ class MultiQuotationProvider extends ChangeNotifier {
   String? _loadedOrganizationRef;
 
   Resource<PaymentQuotes> _quotation = Resource(data: null);
-  bool _isLoaded = false;
 
   List<PaymentIntent>? _lastIntents;
   bool _lastPreviewOnly = false;
   Map<String, String>? _lastMetadata;
+  Timer? _autoRefreshTimer;
+
+  static const Duration _autoRefreshLead = Duration(seconds: 5);
 
   Resource<PaymentQuotes> get resource => _quotation;
   PaymentQuotes? get quotation => _quotation.data;
@@ -29,7 +33,7 @@ class MultiQuotationProvider extends ChangeNotifier {
   Exception? get error => _quotation.error;
   bool get canRefresh => _lastIntents != null && _lastIntents!.isNotEmpty;
   bool get isReady =>
-      _isLoaded && !_quotation.isLoading && _quotation.error == null;
+      quotation != null && !_quotation.isLoading && _quotation.error == null;
 
   DateTime? get quoteExpiresAt {
     final quotes = quotation?.quotes;
@@ -82,6 +86,7 @@ class MultiQuotationProvider extends ChangeNotifier {
         ? null
         : Map<String, String>.from(metadata);
 
+    _cancelAutoRefresh();
     _setResource(_quotation.copyWith(isLoading: true, error: null));
     try {
       final response = await MultiplePaymentsService.getQuotation(
@@ -94,10 +99,10 @@ class MultiQuotationProvider extends ChangeNotifier {
         ),
       );
 
-      _isLoaded = true;
       _setResource(
         _quotation.copyWith(data: response, isLoading: false, error: null),
       );
+      _scheduleAutoRefresh();
     } catch (e) {
       _setResource(
         _quotation.copyWith(
@@ -123,10 +128,10 @@ class MultiQuotationProvider extends ChangeNotifier {
   }
 
   void reset() {
-    _isLoaded = false;
     _lastIntents = null;
     _lastPreviewOnly = false;
     _lastMetadata = null;
+    _cancelAutoRefresh();
     _quotation = Resource(data: null);
     notifyListeners();
   }
@@ -135,4 +140,37 @@ class MultiQuotationProvider extends ChangeNotifier {
     _quotation = quotation;
     notifyListeners();
   }
+
+  void _scheduleAutoRefresh() {
+    _autoRefreshTimer?.cancel();
+    final expiresAt = quoteExpiresAt;
+    if (expiresAt == null) return;
+
+    final now = DateTime.now().toUtc();
+    var delay = expiresAt.difference(now) - _autoRefreshLead;
+    if (delay.isNegative) delay = Duration.zero;
+    _autoRefreshTimer = Timer(delay, _triggerAutoRefresh);
+  }
+
+  Future<void> _triggerAutoRefresh() async {
+    if (_quotation.isLoading) return;
+    final intents = _lastIntents;
+    if (intents == null || intents.isEmpty) return;
+    await quotePayments(
+      intents,
+      previewOnly: _lastPreviewOnly,
+      metadata: _lastMetadata,
+    );
+  }
+
+  void _cancelAutoRefresh() {
+    _autoRefreshTimer?.cancel();
+    _autoRefreshTimer = null;
+  }
+
+  @override
+  void dispose() {
+    _cancelAutoRefresh();
+    super.dispose();
+  }
 }

frontend/pshared/lib/provider/payment/quotation/intent_builder.dart

@@ -1,10 +1,7 @@
 import 'package:pshared/controllers/balance_mask/wallets.dart';
 import 'package:pshared/models/payment/asset.dart';
 import 'package:pshared/models/payment/chain_network.dart';
-import 'package:pshared/models/payment/currency_pair.dart';
 import 'package:pshared/models/payment/customer.dart';
-import 'package:pshared/models/payment/fx/intent.dart';
-import 'package:pshared/models/payment/fx/side.dart';
 import 'package:pshared/models/payment/kind.dart';
 import 'package:pshared/models/payment/methods/card.dart';
 import 'package:pshared/models/payment/methods/crypto_address.dart';
@@ -21,6 +18,7 @@ import 'package:pshared/provider/payment/amount.dart';
 import 'package:pshared/provider/payment/flow.dart';
 import 'package:pshared/provider/recipient/provider.dart';
 import 'package:pshared/utils/currency.dart';
+import 'package:pshared/utils/payment/fx_helpers.dart';
 
 
 class QuotationIntentBuilder {
@@ -40,22 +38,19 @@ class QuotationIntentBuilder {
       method: selectedMethod,
       data: paymentData,
     );
+    final sourceCurrency = currencyCodeToString(selectedWallet.currency);
     final amount = Money(
       amount: payment.amount.toString(),
       // TODO: adapt to possible other sources
-      currency: currencyCodeToString(selectedWallet.currency),
+      currency: sourceCurrency,
     );
     final isCryptoToCrypto = paymentData is CryptoAddressPaymentMethod &&
         (paymentData.asset?.tokenSymbol ?? '').trim().toUpperCase() == amount.currency;
-    final fxIntent = isCryptoToCrypto
-        ? null
-        : FxIntent(
-            pair: CurrencyPair(
-              base: currencyCodeToString(selectedWallet.currency),
-              quote: 'RUB', // TODO: exentd target currencies
-            ),
-            side: FxSide.sellBaseBuyQuote,
-          );
+    final fxIntent = FxIntentHelper.buildSellBaseBuyQuote(
+      baseCurrency: sourceCurrency,
+      quoteCurrency: 'RUB', // TODO: exentd target currencies
+      enabled: !isCryptoToCrypto,
+    );
     return PaymentIntent(
       kind: PaymentKind.payout,
       amount: amount,
@@ -69,35 +64,14 @@ class QuotationIntentBuilder {
       ),
       fx: fxIntent,
       settlementMode: payment.payerCoversFee ? SettlementMode.fixReceived : SettlementMode.fixSource,
-      settlementCurrency: _resolveSettlementCurrency(amount: amount, fx: fxIntent),
+      settlementCurrency: FxIntentHelper.resolveSettlementCurrency(
+        amount: amount,
+        fx: fxIntent,
+      ),
       customer: customer,
     );
   }
 
-  String _resolveSettlementCurrency({
-    required Money amount,
-    required FxIntent? fx,
-  }) {
-    final pair = fx?.pair;
-    if (pair != null) {
-      switch (fx?.side ?? FxSide.unspecified) {
-        case FxSide.buyBaseSellQuote:
-          if (pair.base.isNotEmpty) return pair.base;
-          break;
-        case FxSide.sellBaseBuyQuote:
-          if (pair.quote.isNotEmpty) return pair.quote;
-          break;
-        case FxSide.unspecified:
-          break;
-      }
-      if (amount.currency == pair.base && pair.quote.isNotEmpty) return pair.quote;
-      if (amount.currency == pair.quote && pair.base.isNotEmpty) return pair.base;
-      if (pair.quote.isNotEmpty) return pair.quote;
-      if (pair.base.isNotEmpty) return pair.base;
-    }
-    return amount.currency;
-  }
-
   Customer? _buildCustomer({
     required Recipient? recipient,
     required PaymentMethod? method,